MAGNETIC ELEMENT AND MEMORY DEVICE

摘要

According to one embodiment, a magnetic element includes a first stacked unit and a third ferromagnetic layer. The first stacked unit includes first and second ferromagnetic layers, and a first non-magnetic layer. The first ferromagnetic layer has a first magnetization. The second ferromagnetic layer is separated from the first ferromagnetic layer in a first direction, and has a second magnetization. The first non-magnetic layer is provided between the first and second ferromagnetic layers. The third ferromagnetic layer is stacked with the first stacked unit in the first direction, and has a third magnetization. 2γNzMs is not less than 0.9 times of a magnetic resonance frequency (Hz) of the third ferromagnetic layer, when the second magnetization is Ms (emu/cc), a demagnetizing coefficient of the second ferromagnetic layer is Nz, and a gyro magnetic constant is γ (Hz/Oe).

主权项

1. A magnetic element comprising:
a first stacked unit including
a first ferromagnetic layer having a first magnetization,a second ferromagnetic layer separated from the first ferromagnetic layer in a first direction, the second ferromagnetic layer having a second magnetization, anda first non-magnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer; and a third ferromagnetic layer stacked with the first stacked unit in the first direction, the third ferromagnetic layer having a third magnetization, a component of the first direction of the first magnetization being larger than a component of a second direction perpendicular to the first direction of the first magnetization, a component of the first direction of the second magnetization being smaller than a component of the second direction of the second magnetization, a component of the first direction of the third magnetization being larger than a component of the second direction of the third magnetization, 2γNzMs being not less than 0.9 times of a magnetic resonance frequency (unit: Hz) of the third ferromagnetic layer, when the second magnetization of the second ferromagnetic layer is Ms (unit: emu/cc), a demagnetizing coefficient of the second ferromagnetic layer is Nz, and a gyro magnetic constant is γ (unit: Hz/Oe).